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The Role of Signaling Molecules in Plant Stress Tolerance
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The Role of Signaling Molecules in Plant Stress Tolerance

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Response to Abiotic Stress and Climate Change".

Deadline for manuscript submissions: 30 June 2025 | Viewed by 7670

Special Issue Editors

Dr. Azamat M. Avalbaev

E-Mail Website
Guest Editor
Institute of Biochemistry and Genetics, Ufa Federal Research Centre RAS, 450054 Ufa, Russia
Interests: plant hormones; hormonal crosstalk; plant stress tolerance; plant signaling molecules; signal transduction; gene expression; reactive oxygen species
Dr. Oksana Lastochkina

E-Mail Website
Guest Editor
Institute of Biochemistry and Genetics, Ufa Federal Research Centre RAS, 450054 Ufa, Russia
Interests: crop protection; PGPB; endophytes; plant stress adaptation and tolerance; stress physiology/biochemistry
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Terrestrial plants are sessile organisms, meaning that they are permanently restricted to one place and cannot move away from harsh environmental conditions that can negatively affect their growth and development. As a result of their inability to escape, plants have evolved a wide range of effective biochemical and physiological mechanisms and efficient signal transduction pathways to rapidly respond and adapt to these stress conditions. Extracellular environmental stimuli are transmitted via signaling cascade into intracellular signals by the help of multiple signaling molecules. Plants produce numerous structurally and functionally diverse signaling molecules, including different plant hormones, reactive oxygen species (ROS) and reactive nitrogen species (RNS), proteins, amino acids, nucleotides, vitamins, NO, etc. They are essential for the regulation of growth and development of plants as well as for the activation of protective responses to both biotic and abiotic stresses. Moreover, there is a growing evidence for crosstalk among different signaling pathways in the coordination of defence reactions enabling adaptation of plants to stressful environments. Thus, it has become increasingly important task for plant biologists to study the mechanisms of action of signaling molecules in order to comprehend their effects and roles in plants.

We invite original research and review articles that will expand our understanding of the significance of signaling molecules in the response of plants to adverse environment.

Dr. Azamat M. Avalbaev
Dr. Oksana Lastochkina
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Plants is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • plant signaling molecules
  • signal transduction
  • stress tolerance
  • stress signaling
  • abiotic stress
  • biotic stress
  • plant hormones
  • crosstalk
  • reactive oxygen species

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Published Papers (5 papers)

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Research

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19 pages, 2771 KiB  
Article
The Influence of Chitosan Derivatives in Combination with Bacillus subtilis Bacteria on the Development of Systemic Resistance in Potato Plants with Viral Infection and Drought
by Liubov Yarullina, Joanna Kalatskaja, Vyacheslav Tsvetkov, Guzel Burkhanova, Ninel Yalouskaya, Katerina Rybinskaya, Evgenia Zaikina, Ekaterina Cherepanova, Kseniya Hileuskaya and Viktoryia Nikalaichuk
Plants 2024, 13(16), 2210; https://doi.org/10.3390/plants13162210 - 9 Aug 2024
Cited by 2 | Viewed by 1093
Abstract
Viral diseases of potatoes are among the main problems causing deterioration in the quality of tubers and loss of yield. The growth and development of potato plants largely depend on soil moisture. Prevention strategies require comprehensive protection against pathogens and abiotic stresses, including [...] Read more.
Viral diseases of potatoes are among the main problems causing deterioration in the quality of tubers and loss of yield. The growth and development of potato plants largely depend on soil moisture. Prevention strategies require comprehensive protection against pathogens and abiotic stresses, including modeling the beneficial microbiome of agroecosystems combining microorganisms and immunostimulants. Chitosan and its derivatives have great potential for use in agricultural engineering due to their ability to induce plant immune responses. The effect of chitosan conjugate with caffeic acid (ChCA) in combination with Bacillus subtilis 47 on the transcriptional activity of PR protein genes and changes in the proteome of potato plants during potato virus Y (PVY) infection and drought was studied. The mechanisms of increasing the resistance of potato plants to PVY and lack of moisture are associated with the activation of transcription of genes encoding PR proteins: the main protective protein (PR-1), chitinase (PR-3), thaumatin-like protein (PR-5), protease inhibitor (PR-6), peroxidase (PR-9), and ribonuclease (PR-10), as well as qualitative and quantitative changes in the plant proteome. The revealed activation of the expression of marker genes of systemic acquired resistance and induced systemic resistance under the influence of combined treatment with B. subtilis and chitosan conjugate indicate that, in potato plants, the formation of resistance to viral infection in drought conditions proceeds synergistically. By two-dimensional electrophoresis of S. tuberosum leaf proteins followed by MALDI-TOF analysis, 10 proteins were identified, the content and composition of which differed depending on the experiment variant. In infected plants treated with ChCA, the synthesis of proteinaceous RNase P 1 and oxygen-evolving enhancer protein 2 was enhanced in conditions of normal humidity, and 20 kDa chaperonin and TMV resistance protein N-like was enhanced in conditions of lack of moisture. The virus coat proteins were detected, which intensively accumulated in the leaves of plants infected with potato Y-virus. ChCA treatment reduced the content of these proteins in the leaves, and in plants treated with ChCA in combination with Bacillus subtilis, viral proteins were not detected at all, both in conditions of normal humidity and lack of moisture, which suggests the promising use of chitosan derivatives in combination with B. subtilis bacteria in the regulation of plant resistance. Full article
(This article belongs to the Special Issue The Role of Signaling Molecules in Plant Stress Tolerance)
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13 pages, 3131 KiB  
Article
Exogenous Sodium Nitroprusside Alleviates Drought Stress in Lagenaria siceraria
by Xiaodi Zhang, Saike Qi, Shan Liu, Hongmei Mu and Yiyue Jiang
Plants 2024, 13(14), 1972; https://doi.org/10.3390/plants13141972 - 19 Jul 2024
Viewed by 961
Abstract
Drought is one of the non-biological stresses that affect the growth and development of plants globally, especially Lagenaria siceraria plants. As a common nitric oxide (NO) donor, sodium nitroprusside plays a significant role in enhancing the resistance of plants to non-biological stresses. In [...] Read more.
Drought is one of the non-biological stresses that affect the growth and development of plants globally, especially Lagenaria siceraria plants. As a common nitric oxide (NO) donor, sodium nitroprusside plays a significant role in enhancing the resistance of plants to non-biological stresses. In this study, ‘Yayao’ (L. siceraria) was selected as the material through which to investigate the mitigating effects of different concentrations of sodium nitroprusside on L. siceraria plants under moderate drought stress. The results showed that a concentration of 0.25 mmol·L−1 sodium nitroprusside had the best mitigation effect on drought stress in L. siceraria plants. Under this condition, the plant height and leaf dry weight and fresh weight increased by 12.21%, 21.84%, and 40.48%. The photosynthetic parameters were significantly improved, and the fluorescence parameters Fo and Fm were reduced by 17.04% and 7.80%, respectively. The contents of soluble sugar and proline increased by 35.12% and 44.49%, respectively. The activities of superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD) increased by 51.52%, 164.11%, and 461.49%, respectively. The content of malondialdehyde (MDA) decreased by 34.53%, which alleviated the damage caused by reactive oxygen species. Additionally, sodium nitroprusside promoted the expression of genes related to antioxidant enzymes (SOD, CAT, and POD). Overall, this analysis indicates that an appropriate concentration of sodium nitroprusside can enhance the drought tolerance of L. siceraria plants through multiple aspects and alleviate the harm caused by drought stress. Full article
(This article belongs to the Special Issue The Role of Signaling Molecules in Plant Stress Tolerance)
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17 pages, 2143 KiB  
Article
24-Epibrassinolide Reduces Drought-Induced Oxidative Stress by Modulating the Antioxidant System and Respiration in Wheat Seedlings
by Azamat Avalbaev, Vadim Fedyaev, Alsu Lubyanova, Ruslan Yuldashev and Chulpan Allagulova
Plants 2024, 13(2), 148; https://doi.org/10.3390/plants13020148 - 5 Jan 2024
Cited by 4 | Viewed by 1755
Abstract
Brassinosteroids (BRs) represent a group of plant signaling molecules with a steroidal skeleton that play an essential role in plant adaptation to different environmental stresses, including drought. In this work, the effect of pretreatment with 0.4 µM 24-epibrassinolide (EBR) on the oxidant/antioxidant system [...] Read more.
Brassinosteroids (BRs) represent a group of plant signaling molecules with a steroidal skeleton that play an essential role in plant adaptation to different environmental stresses, including drought. In this work, the effect of pretreatment with 0.4 µM 24-epibrassinolide (EBR) on the oxidant/antioxidant system in 4-day-old wheat seedlings (Triticum aestivum L.) was studied under moderate drought stress simulated by 12% polyethylene glycol 6000 (PEG). It was revealed that EBR-pretreatment had a protective effect on wheat plants as evidenced by the maintenance of their growth rate, as well as the reduction in lipid peroxidation and electrolyte leakage from plant tissues under drought conditions. This effect was likely due to the ability of EBR to reduce the stress-induced accumulation of reactive oxygen species (ROS) and modulate the activity of antioxidant enzymes. Meanwhile, EBR pretreatment enhanced proline accumulation and increased the barrier properties of the cell walls in seedlings by accelerating the lignin deposition. Moreover, the ability of EBR to prevent a drought-caused increase in the intensity of the total dark respiration and the capacity of alternative respiration contributes significantly to the antistress action of this hormone. Full article
(This article belongs to the Special Issue The Role of Signaling Molecules in Plant Stress Tolerance)
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17 pages, 4633 KiB  
Article
Nitric Oxide (NO) Improves Wheat Growth under Dehydration Conditions by Regulating Phytohormone Levels and Induction of the Expression of the TADHN Dehydrin Gene
by Chulpan Allagulova, Azamat Avalbaev, Alsu Lubyanova, Anton Plotnikov, Ruslan Yuldashev and Oksana Lastochkina
Plants 2023, 12(23), 4051; https://doi.org/10.3390/plants12234051 - 1 Dec 2023
Cited by 2 | Viewed by 1497
Abstract
Nitric oxide (NO) is a universal signaling molecule with important regulatory functions in the plant’s life cycle and adaptation to a wide spectrum of environmental stresses including drought. The effect of pre-sowing seed treatment with the donor of NO sodium nitroprusside (SNP, 200 [...] Read more.
Nitric oxide (NO) is a universal signaling molecule with important regulatory functions in the plant’s life cycle and adaptation to a wide spectrum of environmental stresses including drought. The effect of pre-sowing seed treatment with the donor of NO sodium nitroprusside (SNP, 200 μM) on wheat Triticum aestivum L. plants subjected to dehydration (PEG-8000, 12%) was investigated. SNP pretreatment stimulated germination and seedling growth in normal conditions and protected them under dehydration. These effects were confirmed by percentage of seed germination, changes in fresh and dry weight of 5–6-day-old seedlings, as well as by seedlings’ linear dimensions, visual appearance, and mitotic index of the root apical meristem. Assessment of the transpiration intensity (TI) and relative water content (RWC) showed that SNP pretreatment helped to maintain the water status of seedlings subjected to dehydration stress. The data obtained by enzyme-linked immunosorbent assay (ELISA) suggested that the positive effects of SNP may be due to its influence on the phytohormonal system. SNP pretreatment induced an increase in the level of indolylacetic acid (IAA) and especially cytokinins (CK), while essential changes in ABA content were not detected. Water deficiency caused a substantial increase in ABA content and a decrease in the levels of CK and IAA. Pre-sowing SNP treatment decreased stress-induced fluctuations in the content of all studied phytohormones. Using reverse-transcription PCR (RT-PCR), we obtained data on the increase in expression of the TADHN dehydrin gene in SNP-pretreated seedlings under normal and, especially, under dehydration conditions. These findings may indicate the participation of dehydrins in NO-induced defense reactions in wheat plants under water stress. Furthermore, exogenous NO had a stabilizing effect on membrane cellular structures, as evidenced by the reduction of electrolyte leakage (EL) levels and malondialdehyde (MDA) content in dehydrated wheat seedlings under the influence of pre-sowing SNP treatment. Full article
(This article belongs to the Special Issue The Role of Signaling Molecules in Plant Stress Tolerance)
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Review

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25 pages, 5752 KiB  
Review
Appraisal of the Role of Gaseous Signaling Molecules in Thermo-Tolerance Mechanisms in Plants
by Harsha Gautam, Sheen Khan, Nidhi, Adriano Sofo and Nafees A. Khan
Plants 2024, 13(6), 791; https://doi.org/10.3390/plants13060791 - 11 Mar 2024
Cited by 1 | Viewed by 1440
Abstract
A significant threat to the ongoing rise in temperature caused by global warming. Plants have many stress-resistance mechanisms, which is responsible for maintaining plant homeostasis. Abiotic stresses largely increase gaseous molecules’ synthesis in plants. The study of gaseous signaling molecules has gained attention [...] Read more.
A significant threat to the ongoing rise in temperature caused by global warming. Plants have many stress-resistance mechanisms, which is responsible for maintaining plant homeostasis. Abiotic stresses largely increase gaseous molecules’ synthesis in plants. The study of gaseous signaling molecules has gained attention in recent years. The role of gaseous molecules, such as nitric oxide (NO), hydrogen sulfide (H2S), carbon dioxide (CO2), carbon monoxide (CO), methane (CH4), and ethylene, in plants under temperature high-temperature stress are discussed in the current review. Recent studies revealed the critical function that gaseous molecules play in controlling plant growth and development and their ability to respond to various abiotic stresses. Here, we provide a thorough overview of current advancements that prevent heat stress-related plant damage via gaseous molecules. We also explored and discussed the interaction of gaseous molecules. In addition, we provided an overview of the role played by gaseous molecules in high-temperature stress responses, along with a discussion of the knowledge gaps and how this may affect the development of high-temperature-resistant plant species. Full article
(This article belongs to the Special Issue The Role of Signaling Molecules in Plant Stress Tolerance)
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